U.S. National Archives & Records Administration (NARA), record group 104 (U.S. Mint), entry 1 (General Correspondence, 1792-1857), boxes 18 to 21, scanner images 801 to 1200. Scanned under the direction of Robert W. Julian at the NARA Philadelphia facility, operating via a grant from the Central States Numismatic Society. Note, for correspondence, endorsements were generally not copied. Boxes 18 to 21 cover the period November 1836 to December 1841.